Power-hammer.



Patented Sept. 30, |902.

f T. HoLmsTnoM; PUWER HAMMER.

(Application tiled June 3. 1902.\ y

(No Model.) L3

ili

MIMI Ulli INI/ENTOR UNITED STATES Fries.

THURE HOLMSTROU, OF STARBUOK, MINNESOTA, ASSIGNOR OF ONE-HALF TO LOUIS THORSTENSON, OF STARBUOK, MINNESOTA.

POWER-HAM IVI ER.

SPECIFICATION forming part of Letters Patent No. 710,358, dated September 30, 1902. Application filed .Tune 3,1902. Serial No. 110,017. (No model.)

To @ZZ whom t may concern.: which themachineis to be adapted. Along its Be it known that I, THURE IIOLMSTROM, a inner edge the table is provided with a guideeitizen of the United States, residing at Starwayfl., preferably half-dovetail in cross-secbuclnin the county of Pope and State of Min-` tion, and which receives a sliding carriage 5. 55 5 nesota, have invented certain new and useful At the forward portion of the table a frame 6 Improvements in Power-Hammers; and I do is secured, being of a yoke form and having herebydeclare the following to be a full, clear, a segmental rack at its upper portion of suband exact description of the invention, such stantially a half-circle. The feet of this as will enable others skilled in the art to which frame or yoke may be secured to the table in 6o 1o it appertains to make'and use the same. anymanner, they carrying at their upper My invention relates to certain newrand portion a bar '7,interrnediate the length thereuseful improvements in power-hammers, and of being pivoted a lever S, carrying at its uphas for its object novel lmechanism which per end a'pawl 9, actuated by means of the will enable the adjustment of the length of handle 10, the pawl operating within the 65 15 the stroke of the hammer to be effected to as guides 11, carried by the lever, and being fine a degree as is desired without interferpivoted to the lever by means of the arm 12, ing with the movement of the hammer. the pawl and lever being held in their dis- My invention has for its further object a tended position by means ofthe spring 13. device of the character described which shall It will of course be understood that by sim- 7o zo embrace novel means for elfecting a quick ply moving the handle 10 toward the handle return of the hammer after the completion formed on the upper end ofthe lever the of the downward stroke. pawl will become disengaged from the teeth The invention has for its still further obof the segmental rack, permitting the lever ject a device of this character which shall to occupy any desired position. The free or 75 25 be simple and of economical construction, lower end of this lever carries a horizontal have etlicient operation, and which may be arm 14., which is pivoted thereto, as at 15, comparatively cheap to manufacture. the other end of this horizontal Y arm being With the above and other objects in view pivotally mounted on the carriage 5,' as shown the invention further residesin the novel deat 16. At the rear en d lof the base a stand- 8o zo tails of construction and combination of parts ard 17 extends in a vertical direction, at its to be fully described in the following speciupper end receiving an arm 18, which is fication, and then pointed out in the claims. pivoted to the standard -in'proximity to the Referring to the accompanying drawings, end of the arm, the portion of the arm to the illustrating a practical embodiment of the rear of the standard beinginclined upwardly 85 3 5 invention, and wherein like characters of with relation to the major portion of the arm, reference indicate similar parts throughout asV shown at l19. The forward end of this arm the several views, Figure 1 is a side elevation receivesv the hammer 20, which, as is obvious, of the preferred form of the invention. Fig. may beI changed to adapt'l it to thevarying 2 is a vertical sectional view thereof on the -classes ofwork. The connection of the arm 9o 4o lines 1 1 of Fig. 1. Fig. 3 is a horizontal secto the carriage is shown as comprisingasleeve tional view on line 2 2 of Fig. 1. Fig. i is a 21, apertured to receive the arm and having detail view of the slide or carriage carrying a free movement with relation thereto,-this the mechanism for adjusting the throw of the sleeve carrying a bolt or rod 2l,whiwch exhammer, and Fig. 5 is a side elevation of a tends throughaslotted segmental guide-plate 95 45 modification of the invention. 28, the bolt or rod on its free end receiving a By referringto the accompanying drawings nut 24., which retains the sleevein itsrelait will be noted that the base l carries uptive position to the guide-plate.' This'plate rights or standards 2, which at their upper may b'e supported by a brace 25, secured to ends bear a table 8, the table being on one its outer end and to the carriage, as shown, loo side of the machine only and braced to the inner or lower end of the plate being rebest suit the needs of the class of work to ceived on and secured directly to the car- V connecting-bar 39'.

riage. To the base are secured bearings 27, receiving a shaft 28, which has a drive-wheel secured thereto, and the latter, being actuated by any suitable means or power, (not shown,) transmitting motion to the belt 29, engaging over this drive-wheel. Au eccentric or cam 30 is also secured to the shaft 28 and revolves freely within a strap 3l, secured to its periphery, .which at its upper end carries an apertured knob receiving a bolt extending through the lower end of a connecting-rod or pitman 40, the upper end of which is pivotally secured to the sleeve 21, as shown in Fig. 4 at 34.

In order to effect a quick return of the arm carrying the hammer, I provide the rear end 19 of the arm 18 with a spring 19', which extends downwardlyand is secured at its lower end to a short lever 35, pivoted intermediate its ends to the'standards 17. The other end of this lever is secured to the spiral spring 36, which at its upper end is secured to a lug 37, carried by the standard 17. The connecting-rod or pitman 40, as shown in Fig. 2 of the drawings, operates within two parallel side members, which at their lower ends are connected to the apertured knob 32 by means of the bolt 39. At their upper ends these side members carry a connecting-bar 39', receiving the rod 40,which, as previously stated, has a pivotal connection with the sleeve 21. The lower end of the rod 40 carries an apertured plate 42, which is slidingly mounted on the two side members 38 and engages a spiral spring 43 of a very great strength, the latter encircling the rod 40 and bearing against the This connection will materially decrease any jar or vibration which might be imparted to the machine during theA operation.

At the forward end of the machine is arranged the anvil 48, supported upon the block 49, the anvil being so positioned as to lie directly in the path of the hammer when the same has reached the limit of its downward stroke.

In the modification shown in Fig. 5 it will be noted that the parts 48', 3', 17', 19', 5', 25', 23', 18', 19", and 37' are not unlike thoseemployed in the preferred form illustrated in the preceding figures. In this modification, however, I employ a different means for actuating the carriage, which, as shown, comprises a screw-threaded horizontal shaft 50, carrying a hand-wheel 51 at its forward end, the shaft rotating freely within bearings 52 53, rigidly mounted on the table 3'. The carriage carries a sleeve 54, interiorly threaded to receive the rod or shaft 50 and which is adapted to be actuated by the movement of the said rod, according to the direction the latter is rotated in. In other particulars this modication operates precisely the same as the preferred form of the invention.

I claim- 1. In a device of the type set forth, the combination with the base and the standard carried thereby, of a table carried by the base, a carriage slidingly mounted on the table, an arm pivoted to the standard, and carrying a hammer on its forward end, a sleeve on said arm, a segmental plate carried by the carriage, with means carried by the sleeve operating through said segmental plate, means for actuating the arm in a vertical plane, means secured to, the rear end of the arm for returning the same to its normal position, and means for moving the carriage in a horizontal plane.

2. A device of the type set forth,comprising a pivoted arm carrying a hammer on its one end, and means on its other end for returning thev arm toits normal position, a movable carriage with a guide-plate thereon, means freely movable on the arm and movably connected to the guide-plate, and means connected to said last-named means for actuating the arm.

3. In a device ofthe type set forth, the combination with the base and the table, of a carriage movably mounted on the table, an arln pivotally carried bythe base, with a hammer on the arm, a means for actuating the arm, a slotted segmental plate carried by the carriage, with a sleeve freely movable on the arm carrying a bolt engaging through said slotted plate, a means on the table for moving the carriage in a horizontal plane, and

-means carried by the carriage and engaging said last-named means, for forming a connection between the carriage and the last-named means.

In testimony whereof I afx my signature in presence of two witnesses.

THURE HOLMSTROM.

Witnesses:

LOUIS THoRstrENsoN, GEO. W. BEISE.

IOO 

